Lock.



I. D. MERRITT.

LOCK.

APPLICATION FILED SEPT. 23. 1911.

1,1 37,775. I Patented May 4, 1915.

WITNESSES: IIVVENTUI? IHE NORRIS PETERS co. PHOTO LITHO.. WASHINGTON. D.c

srars PAT IRVING D. MERRITT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TOSARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OFCONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented May 4, 1915.

To all whom it may concern:

Be it known that I, IRVING D. MERRITT, a citizen of the United States,and'residing in the city and county of New Haven and State ofConnecticmut, have invented new and useful Improvements in Locks, ofwhich the following is a full, clear, and eXact description, when takenin connection with the accompanying drawings, which form a part thereof.

My invention relates to looks, and more particularly to that type oflock in which a dead bolt is operable by the thumb-turn at the inside ofthe door and a key inserted at the outside of the door.

The primary object of the invention is to provide an improvedarrangement of the thumb-turn hub and dead bolt tumbler with respect toeach other, whereby the efiiciency of the thumb-turn mechanism isincreased and any tendency of the same to jam or stick is eliminated.

With this object and others in view, my invention is embodied inpreferable form in the lock hereinafter described and illustrated in theaccompanying drawings.

In these drawings, Figure 1 is a view in elevation of a lock containingmy improvements and with the cap plate removed; Fig. 2, a similar viewshowing one of the wings of the operating hub in engagement with thetumbler of the deadbolt so as to release said tumbler and with the deadbolt partly protracted; Fig. 3, a vertical section on line wm of Fig. 2through the operating hub, tumbler and bolt; Fig. 4c, a detail plan viewof the deadbolt tumbler; Fig. 5, a detail edge view looking from oneside of said tumbler and the operating hub; Fig. 6, a detail side viewof the operating hub alone; Fig. 7 a side view in elevation of inside ofcap plate with hub in place therein; and Fig. 8 is a detail view of thethumb-turn proper.

Referring to the drawings, 1 is a casing of the lock, and 2 the faceplate thereof. Mounted within said casing is a deadbolt 3 on which ispivoted a tumbler 4' having a locking lug 5 adapted to cooperate with atumbler stump 6 projecting from the rear wall of the casing. Thistumbler is mounted on the inside of the bolt and is provided with aloop-shaped or ring portion 7 at 1ts rear end within the area of whichis formed the opening 8 through the front wall of the casing for thepurpose of receiving the stem 9 of an operating hub 10. The collar 11positions the hub correctly with respect to the tumbler. Near its innerend the hub is provided with two winged portions 12 and 13 extendingradially in substantially diametrically opposite directions from thehub, and providing a double reversible wing. Each wing portion is curvedor inclined forwardly in the line of direction of protracted movement ofsaid hub, such formation being effected by providing a concave curve tothe forward edge of the wing and a conveXcurve to the rear edge of thewing where said rear edge joins the peripheral end of the wing. The hubis squared interiorly and V is adapted to be engaged by a correspondingsquared shank 14 of a thumb turn 15 which grojects beyond the lock onthe inside of the oor.

The wing of the hub lies inside of and over the upper part 16 of theloop portion 7 of the tumbler 6 so that said wing is freely movable overthis part of the tumbler. The lower part 17 of the tumbler is raised,and is provided with a reentrant projection or tongue 18, the inner faceof said tongue and lower part of the ring being substantially flush withthe inner face of the wing of the hub and such projection eX- tendingwithin the circle of the movement of the diametric double wing. In otherwords, the projection 18 of the tumbler is substantially in the plane ofthe double wing of the thumb-turn member, whereas the remaining part ofthe tumbler loop 7 lies back of the wing and presents a surface on whichthe wing is guided for rotation. The projection 18 extends between thetalons 19 of the deadbolt 3, said projection fitting closely against therear talon and leaving a slight Mounted in the casing is a cylinder lockof the usual construction provided with a rotatable operating dog 20 onits inner end. This dog is adapted to engage the tumbler projection 16at the upper part of the loop 7 and at the same time to enter betweenthe upper talons 21 of the deadbolt for the purpose of retracting orprotracting said deadbolt through the operation of a key inserted 10into the cylinder look from the outside of the door. 7 7 The wing of thethumb-turn member 1s normally held in a horizontal position as shown inFig. 1, by means of a spring 10* on the cap plate engaging one edge ofthe wing, as shown in lig. 7.

The operation of the device is as follows: When it is desired toprotract the bolt from the inside of the door by the thumb turn, the

latter is turned clockwise whereupon the wing of the hub that isdisposed toward the rear will be turned so as to carry the end of thewing against the inner end of the projection l8, forcing said projectionoutward by the peripheral contact of the end of the wing with saidprojection until the tumbler is released from the tumbler stump. At thesame time, the wing enters between the lower talons of the bolt and thebolt will be protracted in the further movement of the hub. As thelocking lug of the tumbler is carried past the stump to the other sidethereof the tumbler is restored to locking position, and the wing iscarried past and free of the talons, in which position it will be seenthat the hub is unconnected with the tumbler and hence the tumbler andbolt may be retracted through the rotatable dog of the cylinder lockwithout rotating said hub. If after 4 such retraction by the dog of thecylinder lock, the bolt is again protracted by the thumb turn, the wingportion opposite to that which has efiected the preceding operationengages the tumbler and lower" talons and protracts the bolt.

therefore permits the hub to be free of the bolt and tumbler and yetalways in position to protract or retract the bolt.

Having thus described my invention, what I claim and desire to secure byLetters Patcut, is

1. In a look, a bolt having different pairs of talons, a tumbler for thebolt, a projection on said tumbler movable between the talons of onepair, key operated means cooperatingwith said projection and with saidlast named talons, another projection on the tumbler movable between thetalons of the second pair, and a thumb-turn member c0- operating withsaid last named projection and with the second pair of talons; substantially as described. I

j 2. In a look, a bolt having a pair of tal ons, a tumbler having aprojection movable between said talons, a thumb-turn hub hav- The doublewing ing a diametrical. double wing movable in a circle and either endofwhich is arranged to coact with said tumbler projection and saidtalons, and a spring acting on said thumb-turn hub and normally-holdingsaid double wingout of contact with said projection and said talons;substantially as described.

3. In a look, a bolt having a pair of talons, a tumbler having aprojection movable between said talons, a thumb-turn member movable in acomplete circle and having a diametrical double wing,- either end ofwhich is arranged to cooperate with said tumbler projection and saidtalons, means on the go tumbler to guide said wing into engagement withsaid projection and talons, and means acting on said thumb-turn memberand normally holding it in a horizontal position and clear of the boltand tumbler, so that the bolt may be protracted without actuating saidthumb-turn member; substantially as described.

4. In a look, a bolt having talons, a tumbler having a loop, athumb-turn member mounted within saidloop and havingawing movable overand guided by the latter, and; a projection on said loop between thebolttalons arranged in the plane of the thumbturn wing and adapted to beengaged by the latter said thumb turn member movable in a completecircle; substantially as described.

5. In a look, a bolt having upper and lower talons, a tumbler for thebolt having a loop, a projectionon said loop entering the space betweentheupper talons, another projection on said. loop entering the spacebetween the lower talons, key actuated means cooperating with one ofsaid projections and the adjacent talons, and thumbturn operated meanscooperating with the other proj ection and its adjacent talons;substantially as described.

6. In a look, a bolt having upper and lower talons, a tumbler for saidbolt having a loop, a projection on said loop entering the space betweenthe upper talons, another projection on said loop entering the spacebelow the lower talons, a cylinder lock having a dog cooperating withthe upper projection and the upper talons, and a thumb-turn hubextending through said loop and having .a wing cooperating with thelower projection and the lower talons; substantially as described. 12a

7. In a lock, a bolt having different pairs of talons, a tumbler havingprojections co operating with the respective pairs of talons, a cylinderlock having a dog cooperating with one of the tumbler projections andone pair of talons,'a thumb-turnhub having a double ended wing rotatablein a complete circle and cooperating with the other tumbler projectionand the otherbolt talons, said wing being engageableat the same end, ona movement of the bolt in one direc- In Witness whereof, I have hereuntoset tion, with the last named projection and talmy hand on the 24th dayof August, 1911. ons, and a spring normally holding said IRVING D.MERRITT. Wing out of engagement With said last Witnesses:

5 named projection and talons; substantially JOHN H. SHAW, as described.BERTHA RAY.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

